Emi; Electromagnetic Interference (Emi) From Radio Wave Sources - Active Care Medical Spitfire 1310 Owner's Manual

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3. EMI

This portion of the manual will provide the user with basic information about the
problems with EMI (electromagnetic interference), protective measures can be
used to either lessen the possibility of exposure or to minimize the degree of
exposure; this section also shows some conditions that unexpected or erratic
movements may cause.
◊
Caution
It is very important that you read this information regarding the
possible effects of electromagnetic interference on your electric
ActiveCare scooter.
ELECTROMAGNETIC INTERFERENCE (EMI) FROM RADIO WAVE
SOURCES
Powered scooters may be susceptible to electromagnetic interference (EMI), which
is interfering electromagnetic energy (EM) emitted from sources such as radio
stations, TV stations, amateur radio (HAM) transmitters, two-way radios, and
cellular phones. The interference (from radio wave sources) can cause the
powered scooter to release its brakes, move by itself, or move in unintended
directions. It can also permanently damage the powered scooter's control system.
The intensity of the interfering EM energy can be measured in volts per meter
(V/m). Each powered scooter can resist EMI up to a certain intensity level. The
higher the immunity level the greater the protection. At this time, current
technology is capable of achieving at least a 20 V/m immunity level, which would
provide useful protection from the more common sources of radiated EMI. This
powered scooter model as shipped, with no further modification, has an immunity
level of 20 V/m without any accessories.
There are a number of sources of relatively intense electromagnetic fields in the
everyday environment. Some of these sources are obvious and easy to avoid.
Others are not apparent and exposure is unavoidable. However, we believe that by
following the warning listed below, your risk to EMI will be minimized.
The sources of radiated EMI can be broadly classified into three types:
1. Hand-held portable transceivers (transmitter-receivers with the antenna
mounted directly on the transmitting unit). Examples include: citizens band
(CB) or hand held radios, (security, fire, and police transceivers), cellular
telephones and other personal communication devices.
NOTE: Some cellular telephones transmit a signal while they are ON but not being
used.
Spitfire Owner's Manual 6